Engine-detector.



G. B. G I LMAN.

' ENGINE DETECTOR.

APPLICATION FILED FEB.11,1914.

1,125,510. Patented Ja11 .19,1915.

' Witnesses Attorneys THE NORRIS PETERS CD" PHOTD-LITHO-. WASHINGTON. D.C,

errors.

GEORGE BEAN GTLIVIAN, 0F GARDINER, MAINE.

ENGINE-DETECTOR.

Application filed February 11, 1914.

To all whom it may concern:

State of Maine, have invented a new and v useful Engine-Detector, ofwhich the following is a specification.

One object of the specification is the provision of a detector, by meansof which an unsteady or intermittent action in a fly wheel andconsequently the operation of an engine may be determined accurately,the present apparatus or instrument being small. and compact to permitof the ready handling of the game so that the party operating it mayhold the same in both hands and sight with one eye, so as to detect anyuneven operation oi the engine. 7

A further object or" the presentinvention, is the provision 0i adetector of this character which is provided with a spring motor and anescapement mechanism connect- 7 ed thereto for operating a swingingshutter which is adapted to be disposed or placedinto and out ofregistration with an observation aperture, thus providing m ans that canbe readily carriedin the hands of the one detecting, and thus be aself-con tained adjustable mechanism that may be wound similarly to aclock and which will operate for a suliicient period 01 time to carryout the detecting test.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the con1- bination andarrangement or parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in thepreciseembodiment of the invention herein disclosed can be made withinthe scope of what is claimed without departing from the spirit of theinvention. r

In the drawingsFigure 1 is a view showing the complete operatingmechanism for the swinging shutter, the portion carrying the observationaperture being removed. Fig. 2 is a side elevation of the completedevice minus the spring motor and its train of gears. Fig. 3 is a rearelevation oi the observation aperture plate per so.

In the drawings, A designates a casing, which carries therein, thespring motor B which operates through the trainof gears B, theescapement wheel C, this structure being similar to the usual form ofspring Specificationof Letters Patent.

Patented Jan. in, 1915..

Serial No. 818,113.

operated clocks, and being approximately of a size that is convenientlymanipulated by both hands of the operator. Pivoted at D is the swingingarm E, which has a portion thereof in coiiperable relation to theescapement wheel C, while its free end E which is bifurcated andprovided as shown with four teeth engages the hub of the balance wheelH, at points eccentric thereof, so that such balance wheel due to theaction of the spring upon the escapement wheel, will be oscillated, asin a clock, and provides the operating mechanism for this device. Uponthe arbor K of the balance wheel H, isa pinion K which meshes with thetoothed segment J carried upon the transverse shaft J. Connected at L tothe toothed segment J is one terminal of the coiled spring I whose otherterminal is connected to the interiorlythreaded bar Q mounted upon thevertically disposed feed screw M. The bar 0 is mounted for slidingmovement upon the frame P so that as the screw M is rotated through theinstrumentality of the knob N, the bar 0 is moved relatively to theframe P and consequently the tension of the spring I is ad justed. Bythis means, the speed of oscillation of the balance wheel andconsequently the arm or lever E is determined.

Connected to and carried upon the shaft D is an arm G, which constitutesa pendant shutter provided with the elongated aperture T. It will thusbe seen that as the motor B operates the train of gears, that theshutter G will be oscillated and therefore present the slot T in thesame position twice during each oscillation.

In the plate Q or the casing as illustrated in Fig. 3, there is provideda circular aperture R and adqustably attached to said plate an aperturedplate S, having the elongated aperture T which may be adjustedrelatively to the aperture it according to the angularity of which thepresent instrument is to be used. The shape and length of the apertureor slot T is similar to the slot or aperture T of the shutter G, and

at certain periods of the oscillation of the shutter G these slots orapertures exactly register, this being as before stated, once everymovement or twice each complete oscillation of the shutter.

Attached to and carried upon the outside of the casing, is theobservation member or tube U, which is in registration with the openingB so that the operator in gripping the present instrument in one or bothhands with the tube U to one eye, will look through the stationary slot'1" and each time that the slot T of the shutter G registers therewith,a clear vision for the instant will be given.

To lock the device from operation, a spring plate whose tension normallyplaces its free end in the path to engage the segment J, is provided. Tomove the same from engagement with the segment, a cam S is carried bythe knobbed stem V, so that as the stem is rotated manually, the freeend of the plate 11 is moved away from the segment or permitted to movetoward and lock it.

With the present device, the exact speed of the engine is notdetermined, but the questien as to whether the speed is uniform orintermittent can be determined.

in order to determine the steadiness of high speed engines, it isnecessary that the shutter G oscillate rapidly, or what is known inphotography as instantaneous, and such openings as T and T must be soshaped and arranged, that persistent vision gives a clear view throughthe hole or apertures while the same is opening and shutting, as lookingthrough a rapidly rotating spoked wheel.

it has been found in practice, that the closed period must be more, orof greater duration than the open period, the ditference depending uponthe use of the instrument and the conditions under which it is to beused. The special purposes for which this instrument is designed, is totest the uni- V formity of the speed of engines, or any other hind ofmachinery that contains rotary parts that should rotate at a steady,instead of an intermittent speed, and with this device, an intermittent,spasmodic or variable speed may be ascertained.

in carrying out the present invention, the

I feed screw M is adjusted to permit the imparting of movement to theshutter G, at the desired speed, and where desirable, a white sheet orcon is placed at one side of the engine adjacent the fly or balancewheel thereof, while the person desiring to detect will standapproximately 15 feet from the wheel at the opposite side to the screw.\Vith the observation member U disposed at one eye of the operator, theother eye being closed, the operator now looks through the slot T towardthe fly wheel of the engine, and the adjusting nut N is then adjusted ifneed be, so as to regulate the speed of the shutter G or until thespokes in the fly wheel are apparently still or motionless, that is whenthe shutter G is in synchronism with the motion of the spokes of the flywheel. By continually watching the move- Gopics of this patent may beobtained for five cents each,

ment of the'fly wheel through the apertures T and T, the fly wheelcontinues to move so that the spokes. appear motionless, the speed ofthe engine is unvariable and steady,

while should the wheel apparently stop for a.

second and turn in a reverse direction very slowly it will indicateinstantly that the g v-1 a short time any fault in the operation of thegovernor may be detected and corrected. lVh-at is claimed is: i 1. In adevice of this character, a support, a spring motor mounted therein, anescapement device-operably connected to the spring motor, an adjustablebalancing mechanism,

a lever connecting the escapement device and balancing mechanism, ashutter having a peep-hole connected to be oscillated by the lever, anda fixed observation member with which the peep-hole alines during theoscillation of the shutter.

2. In a device of this character, a support having a fixed peep-holetherethrough, a spring motor mounted in the support, an escapementdevice operably connected there to, a balancing mechanism, means foradjusting the same, a lever connecting the escapement device andbalancing mechanism, and-a shutter having a peep-hole, said shutterbeing connected to the lever to be oscillated thereby, whereby saidpeep-hole is oscillated to be placed into and out of registration withthe fixed peep-hole. V 1

3. In a device of this character, a support having a stationarypeep-hole, a spring motor mounted in the support, an escapement deviceoperably connected to the spring motor, an adjustable balancingmechanism, a spring connected thereto, manually controlled selectivemeans for adjusting the spring and the balancing mechanism thereby,alever connecting theescapement device and balancing means to beoscillated by the spring motor through the e capement device and atvariable speeds according to the balancing device, and a pendant shutterprovided with a peep-hole connected to and operated by the lever, saidshutter being disposed to be oscillated so that the peep hole thereof isplaced into and out of registration with the fixed peep-hole.

GEORGE BEAN GTLMAN. Witnesses:

CHAS. O. Huoswon'rn, GEO. E. CLARK.

by addressing the Commissioner of Patents,

Washington, I). C.

